The Department of the Army, Army Corps of Engineers, Jacksonville District, has a requirement for the construction of the S-355W Spillway as part of the Central Everglades Planning Project (CEPP), one of the elements of the Comprehensive Everglades Restoration Plan (CERP).

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The Scope of Work for this project includes the following features: Excavation, dewatering, blasting, levee embankment repairs, and construction for a new spillway structure and associated sheet pile retaining walls. These new project components are constructed approximately 4.2 miles east of the existing S-333 and S-333E spillways, along the L-29 Levee System, Section 3 Levee Segment. The overall site is approximately 7.9 acres. Specific project components include the following items and incidental related work: The new spillway structure has a design capacity of approximately 1,200 cubic feet per second (cfs) with two bays with vertical lift roller gates, a control room, a service bridge, and a two-lane public access bridge. Lower the existing levee crown elevation within the project site from the existing levee crown elevations current elevation of 20 to 22 feet NAVD88 down to a final elevation of 17 feet NAVD88.The lowering of the levee starts approximately 300 feet west of the S-355W service road centerline and extends to the western end of the low area east of S-355W.The new spillway is required to be constructed in the dry and requires the installation of a cofferdam system. The cofferdam system consists of steel sheet piles, tremie slab and anchors. The new spillway requires the installation of sheet pile retaining walls on both the intake and discharge sides, and along the south side of the L-29 canal to support the new right turn lane from US41. The bulkhead walls consist of steel sheet piles and are anchored tie back anchors. The project includes installation of rip rap slope protection along the canal banks and Marine mattress along the canal bottom of the L-29 canal. The project includes installation of monitoring platforms within the L-29 canal inside the project limits.